[patch 1/3] KVM: task switch: translate guest segment limit to virt-extension byte granular field

[Marcelo Tosatti <mtosatti@redhat.com>]

[-- Attachment #1: vmx-seg-limti --]
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If 'g' is one then limit is 4kb granular.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: kvm-vmx-checks/arch/x86/kvm/x86.c
===================================================================
--- kvm-vmx-checks.orig/arch/x86/kvm/x86.c
+++ kvm-vmx-checks/arch/x86/kvm/x86.c
@@ -3195,6 +3195,10 @@ static void seg_desct_to_kvm_desct(struc
 	kvm_desct->base |= seg_desc->base2 << 24;
 	kvm_desct->limit = seg_desc->limit0;
 	kvm_desct->limit |= seg_desc->limit << 16;
+	if (seg_desc->g) {
+		kvm_desct->limit <<= 12;
+		kvm_desct->limit |= 0xfff;
+	}
 	kvm_desct->selector = selector;
 	kvm_desct->type = seg_desc->type;
 	kvm_desct->present = seg_desc->p;
@@ -3222,8 +3226,12 @@ static void get_segment_descritptor_dtab
 
 		if (kvm_seg.unusable)
 			dtable->limit = 0;
-		else
-			dtable->limit = kvm_seg.limit;
+		else {
+			if (kvm_seg.g)
+				dtable->limit = kvm_seg.limit >> 12;
+			else
+				dtable->limit = kvm_seg.limit;
+		}
 		dtable->base = kvm_seg.base;
 	}
 	else

--